{
  "manageEntity": {
    "action": "Save",
    "entityId": "1989024530",
    "entityType": "Track",
    "nonce": "0x92631e2671b5d2e2a10c60acbec841624778cf7784bc1a5ef4d97f68fd7a9ff4",
    "signature": "0x4c590e8b1f72d8be07e095cf07d2bde3dbfb3f2c8e6eaf21eee4eb0aae40056b575aa897276ff8759383390cde9094e5918c170897b69cc2c4bfe66c312a123d1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}